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08-20-2011, 10:12 AM
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#1
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Winnebago Camper
Join Date: Apr 2011
Location: Indianapolis, Indiana
Posts: 15
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Lost my dash blower/AC
Went to install a Ham radio in my 2005 Winnebago Sightseer 29r yesterday. Started the engine as I usually do when I visit the rig (it stays in a storage lot). It has been about two weeks since I'd started it.
I noticed that I had no blower, and I don't hear the AC compressor cycling. I checked fuses and they all are good. I pulled the connector off the blower motor and there's no voltage there.
Any ideas?
HELP!!!?
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08-20-2011, 10:35 AM
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#2
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Winnie-Wise
Join Date: Jun 2006
Location: Southern California
Posts: 489
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Try looking for a bad ground wire comming from the blower motor. You don't happen to have a mouse or rat problem in the storage yard do you? They can eat thru wires and cause all kinds of problems. Rabbits too.
Sammie
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2015 Tiffin Bus 37AP
2016 Ford Explorer
"A Job Begun is Half Done"
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08-25-2011, 09:19 AM
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#3
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Winnebago Camper
Join Date: Apr 2011
Location: Indianapolis, Indiana
Posts: 15
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No, no problem with critters. Blower motor doesn't have a separate ground wire. Voltage isn't getting to the blower.
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09-04-2011, 06:14 PM
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#4
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Winnebago Camper
Join Date: Apr 2011
Location: Indianapolis, Indiana
Posts: 15
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I've replaced fuses and relays to no avail. I find that there is no voltage getting to the blower motor, or to the blower speed resistors.
I guess it's a trip to camping world next.
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09-04-2011, 06:18 PM
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#5
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Winnebago Watcher
Join Date: Aug 2011
Posts: 4
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If you have been under the dash installing stuff make sure the plugs are tight at the rear of the control head.
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09-04-2011, 06:50 PM
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#6
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Winnebago Camper
Join Date: Apr 2011
Location: Indianapolis, Indiana
Posts: 15
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Quote:
Originally Posted by rv.guru
If you have been under the dash installing stuff make sure the plugs are tight at the rear of the control head.
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What is the control head?
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09-04-2011, 07:02 PM
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#7
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Winnebago Watcher
Join Date: Aug 2011
Posts: 4
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Back side of controls on the dash
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09-04-2011, 10:35 PM
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#8
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Winnebago Camper
Join Date: Apr 2011
Location: Indianapolis, Indiana
Posts: 15
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Quote:
Originally Posted by rv.guru
Back side of controls on the dash
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Yeah, I haven't been able to remove the radio to get at the blower control. I have the removal tools but it just won't release. All I can do is reach around the radio and make sure that the connector is on good.
I can't imagine that installing the Ham radio caused the problem. I used the factory prepped CB wiring to power the Ham rig, so I wasn't really messing with any other wiring.
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09-05-2011, 07:32 AM
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#9
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Winnebago Watcher
Join Date: Aug 2011
Posts: 4
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Sometimes it takes a bump or little pull on a wire and all hell can break loose. Just a silly question, but did you have the house batteries turned on, I know on some monaco's they wont work as well as a few other key items if the batteries are off.
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09-05-2011, 07:42 AM
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#10
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Winnebago Owner
Join Date: Dec 2009
Location: Mcdonough, Ga.
Posts: 73
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The fuse holder for the blower is under the hood. It is a small plastic 3/4 X 1 inch dia. It has two or three fuses.
__________________
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32 years mechanic at Delta Air Lines 15 year motorhome service manager. 3 popups....2 travel trailers....5 motorhomes....loved them all.
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09-05-2011, 04:46 PM
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#11
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Winnebago Watcher
Join Date: Sep 2011
Posts: 1
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Check the resistor block
Many of the RV AC blower motors have a resistor block that steps the voltage down to get the different motor speeds. I don't know if your system uses this technique but these resistor blocks carry a lot of current and the contacts often become corroded. Finding this resistor block can be interesting. Some times they are on or near the AC blower motor and sometimes they are up front under the hood so they get some cooling air. They are 2-3" x 1-2" with coiled wires that are the actual resistors. Fairly easy to remove, fairly cheap to replace, fairly hard to find.
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09-05-2011, 06:15 PM
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#12
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Winnebago Camper
Join Date: Apr 2011
Location: Indianapolis, Indiana
Posts: 15
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Quote:
Originally Posted by bgbevan
Many of the RV AC blower motors have a resistor block that steps the voltage down to get the different motor speeds. I don't know if your system uses this technique but these resistor blocks carry a lot of current and the contacts often become corroded. Finding this resistor block can be interesting. Some times they are on or near the AC blower motor and sometimes they are up front under the hood so they get some cooling air. They are 2-3" x 1-2" with coiled wires that are the actual resistors. Fairly easy to remove, fairly cheap to replace, fairly hard to find.
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I covered that a few post up, but thanks for the help anyway. The connectors for the resistor block are fine, other than there being no voltage on any of the wires there.
The fuses check good in that fuse block under the hood. I even replaced the relays just in case.
I'm really at my wits end on this thing, and I make my living as an electronics technician!!
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09-06-2011, 07:48 AM
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#13
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Winnebago Master
Join Date: Mar 2009
Posts: 851
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It might be the ignition switch believe it or not, since blower power runs through there, Does the dash radio work properly? Try the Accessory position.
Now, My dash radio gave me fits.. Turns out removing and replacing the perfectly good fuse fixed it.. Or else torquing the wireing harness, not sure which but I made no changes and now it's working
The only solution is to remove the fuse block and check for pwer on the fuse "Load" lead. (use a test lamp not a volt meter) then find the blower switch and check for power there, then keep moving till you no longer "See the light" as it were.
If you are a ham, you should be able to figure it out from there.. 73 DE WA8YXM
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